[wasm] Remove the use of the "external" bit on OldFunctions section.

src/wasm/wasm-module.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_WASM_MODULE_H_
 #define V8_WASM_MODULE_H_
 
 #include "src/wasm/wasm-opcodes.h"
 #include "src/wasm/wasm-result.h"
 
@@ skipping 78 matching lines @@
   static WasmSection::Code end();
   static WasmSection::Code next(WasmSection::Code code);
   static const char* getName(Code code);
   static int getOrder(Code code);
   static size_t getNameLength(Code code);
   static WasmSection::Code lookup(const byte* string, uint32_t length);
 };
 
 enum WasmFunctionDeclBit {
   kDeclFunctionName = 0x01,
-  kDeclFunctionImport = 0x02,
   kDeclFunctionLocals = 0x04,
   kDeclFunctionExport = 0x08
 };
 
 // Constants for fixed-size elements within a module.
 static const size_t kDeclMemorySize = 3;
 static const size_t kDeclDataSegmentSize = 13;
 
 static const uint32_t kMaxReturnCount = 1;
 
 // Static representation of a WASM function.
 struct WasmFunction {
   FunctionSig* sig;      // signature of the function.
   uint32_t func_index;   // index into the function table.
   uint32_t sig_index;    // index into the signature table.
   uint32_t name_offset;  // offset in the module bytes of the name, if any.
   uint32_t name_length;  // length in bytes of the name.
   uint32_t code_start_offset;    // offset in the module bytes of code start.
   uint32_t code_end_offset;      // offset in the module bytes of code end.
   uint16_t local_i32_count;      // number of i32 local variables.
   uint16_t local_i64_count;      // number of i64 local variables.
   uint16_t local_f32_count;      // number of f32 local variables.
   uint16_t local_f64_count;      // number of f64 local variables.
   bool exported;                 // true if this function is exported.
-  bool external;  // true if this function is externally supplied.
 };
 
 // Static representation of an imported WASM function.
 struct WasmImport {
   FunctionSig* sig;               // signature of the function.
   uint32_t sig_index;             // index into the signature table.
   uint32_t module_name_offset;    // offset in module bytes of the module name.
   uint32_t module_name_length;    // length in bytes of the module name.
   uint32_t function_name_offset;  // offset in module bytes of the import name.
   uint32_t function_name_length;  // length in bytes of the import name.
@@ skipping 199 matching lines @@
 // Extract a function name from the given wasm object.
 // Returns undefined if the function is unnamed or the function index is
 // invalid.
 Handle<Object> GetWasmFunctionName(Handle<JSObject> wasm, uint32_t func_index);
 
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_WASM_MODULE_H_